One of these. http://www.jaycar.co.nz/productView.asp?ID=LT3045&keywords=3+way+splitter&form=KEYWORDor 2 of the 2 way ones. They don''t seem to do a 3 way.I think you might find them in Bunnings and Mitre 10 Mega too.Terminate unused sockets with a 75 ohm terminator.